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  <title>扩展中的其他变化</title>

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  <h2 class="title">扩展中的其他变化</h2>
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   扩展中行为和新特性的变化:
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     <a href="book.mysqli.html" class="link">mysqli</a>
     - <a href="class.mysqli-result.html" class="classname">mysqli_result</a> 现在实现 <a href="class.traversable.html" class="link">Traversable</a>
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     <a href="ref.pdo-mysql.html" class="link">pdo_mysql</a>
     - 不再支持使用低于 4.1 版本的 MySQL 客户端库连接。
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    MySQL 扩展 <a href="book.mysql.html" class="link">mysql</a> 、<a href="book.mysqli.html" class="link">mysqli</a> 及 <a href="ref.pdo-mysql.html" class="link">PDO_mysql</a> 现在使用 <a href="book.mysqlnd.html" class="link">mysqlnd</a> 作为默认库。通过在配置选项中指定路径仍然可以使用 libmysqlclient 。
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     <a href="book.mysqlnd.html" class="link">mysqlnd</a>
     - 增加支持命名管道
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